Brake drum



FIG. 1 is a front view of the brake drum;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a section view thereof along line 8-8 of FIG. 1. 

CLAIM The ornamental design for a brake drum, as shown and described. 